Filed by Huntington Bancshares Incorporated
Pursuant to Rule 425 under the Securities Act of 1933
and deemed filed pursuant to Rule 14a-6(b)
of the Securities Exchange Act of 1934

Subject Company: Sky Financial Group, Inc.
(Commission File No. 333-140897)


On May 1, 2007, Huntington Bancshares Incorporated included the following comment relating to the merger in its quarterly letter to shareholders:

Our shareholder meeting to approve the acquisition of Sky Financial Group, Inc. has been set for May 30, 2007. Detailed information on this is being mailed to Huntington shareholders of record as of March 15, 2007. Much merger integration preparation is underway. Consistent with our announcement last December, we remain highly confident that the merger will generate significant value for shareholders.

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Additional Information About the Huntington and Sky Financial Group Merger and Where to Find It

In connection with the proposed merger of Huntington Bancshares Incorporated and Sky Financial Group, Huntington and Sky Financial will be filing relevant documents concerning the transaction with the Securities and Exchange Commission. On April 19, 2007, Huntington filed Amendment No. 2 to the registration statement on Form S-4 with the Securities and Exchange Commission, which includes the final proxy statement/prospectus. Stockholders are able to obtain a free copy of the proxy statement/prospectus, as well as other filings containing information about Huntington and Sky Financial, at the Securities and Exchange Commission’s internet site (http://www.sec.gov). Copies of the proxy statement/prospectus and the filings with the Securities and Exchange Commission that are incorporated by reference in the proxy statement/prospectus can also be obtained, without charge, by directing a request to Huntington, Huntington Center, 41 South High Street, Columbus, Ohio 43287, Attention: Investor Relations, 614-480-4060, or Sky Financial, 221 South Church Street, Bowling Green, Ohio, 43402. The final proxy statement/prospectus has been mailed to stockholders of Huntington and Sky Financial.

Stockholders are urged to read the proxy statement/prospectus, and other relevant documents filed with the Securities and Exchange Commission regarding the proposed transaction when they become available, because they will contain important information.

The directors and executive officers of Huntington and Sky Financial and other persons may be deemed to be participants in the solicitation of proxies in respect of the proposed merger. Information regarding Huntington’s directors and executive officers is available in its proxy statement included in the registration statement filed with the SEC by Huntington on April 19, 2007. Information regarding Sky Financial’s directors and executive officers is available in its proxy statement filed with the SEC by Sky Financial on February 23, 2006. Other information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, are contained in the proxy statement/prospectus and other relevant materials to be filed with the SEC when they become available.